7719-09-7Relevant articles and documents
Burg, A. B.,Birnbaum, E. R.
, p. 146 - 147 (1958)
7H-pyrrolo[2,3-d]pyrimidine derivatives
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, (2008/06/13)
The invention relates to 7H-pyrrolo[2,3-d]pyrimidine derivatives of formula I wherein the symbols and substituents are as defined in the description, to processes for the preparation thereof, to pharmaceutical compositions comprising such derivatives and to the use of such derivatives—alone or in combination with one or more other pharmaceutically active compounds—for the preparation of pharmaceutical compositions for the treatment especially of a proliferative disease, such as a tumour.
Method for the preparation of 2-chloro sulfinyl azetidinones
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, (2008/06/13)
An improved method for the preparation of 2-chloro sulfinyl azetidin-4-one of the formula: STR1 wherein R is: hydrogen; C1 -C3 alkyl; halomethyl; cyanomethyl; phenyl; substituted phenyl; phenoxy, benzyloxy- or substituted benzyl; a group of the formula R2 --O--wherein R2 is t-butyl, 2,2,2-trichloroethyl, benzyl or substituted benzyl; a group of the formula R3 --(O)n --CH2 wherein R3 is phenyl or substituted phenyl. The 2-chlorosulfinylazetidin-4-one is prepared by reacting a penicillin sulfoxide ester of the general formula STR2 wherein R and R1 have the meanings defined above with an N-chloro halogenating agent in an inert organic solvent. The reaction is carried out in the presence of an acid scavenging amount of a phosphate or hydrogen phosphate of an alkali metal, alkaline earth metal, ammonium, quaternary ammonium or mixtures thereof. These compounds find application as intermediates in the production of cefaclor which are powerful anti-bacterial compounds.
Silicate compounds for DNA purification
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, (2008/06/13)
The present invention relates to a silicon-containing material which exhibits sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the material. Generally, the hydrophilic and electropositive characteristics are expressed at the surface of the silicon-containing material. Preferred silicon-containing materials of the present invention include boron silicate, aluminum silicate, phosphosilicate, silica carbonyl, silica sulfonyl and silica phosphonyl. The silicon-containing materials of the present invention are particularly useful in processes for purification of DNA from other cellular components. In these processes, a suspension of cellular components is placed in contact with the silicon-containing material, the silicon-containing material is washed to remove all cellular components other than DNA which are bound to the material, and the bound DNA is eluted from the material. Several of the silicon-containing materials are capable of binding and eluting DNA using only water.
